Maybe I figured it out! Thanks for the tips:
It seems that it’s because the ceiling is not (somehow) being considered by Lumen, when I enable r.Lumen.Visualize.CardPlacement 1 I can see only the ceiling doesn’t appear, but the walls do appear. The house is a full static mesh merged with different materials (I saw that because of that, this could not be compatible by Lumen)
View of outside with CardsPlacement enabled:
View of inside with CardsPlacement enabled:
View of outside with Lumen Visualization mode (i’m not sure what those colors mean):
View of insidewith Lumen Visualization mode (i’m not sure what those colors mean):
Although: Even with that all, in editor it works perfectly (the Spotlight works even when not looking at the illumination), and in-game it doesn’t work like I showed in my videos.